X_ISLAND_MODULE_DUPLICATED
Means
An island chunk bundles one module more than once
Typical cause
the island build shipped one framework module twice — one file under two path spellings, or a second @ultimat3/* copy — so its bytes and its module state are duplicated in the chunk
Fix
gh issue create --repo developerz-ai/ultimate --title "X_ISLAND_MODULE_DUPLICATED" — paste this error's --json as the body: the framework bundled one of its own modules twice